PICTURES: Photo of the Day

Every day, we bring you the top photo of the day. Here is a collection of these photos.

U.S. President Barack Obama, second from left, smiles as he meets with Japan's Prime Minister Yoshihiko Noda, right, during the East Asia Summit at the Peace Palace in Phnom Penh, Cambodia, Tuesday, Nov. 20, 2012. Smiling at left is U.S. Secretary of State Hillary Rodham Clinton. (AP Photo/Carolyn Kaster)

Director Steven Spielberg speaks at a ceremony to mark the 149th anniversary of President Abraham Lincoln's delivery of the Gettysburg Address at Soldier's National Cemetery in Gettysburg, Pa., Monday, Nov. 19, 2012. Spielberg and historian Doris Kearns Goodwin delivered remarks and participated in a wreath-laying ceremony. (AP Photo/Patrick Semansky)

U.S. President Barack Obama, left, reacts when he was asked which was his favorite Thai food, during a joint news conference with Thai Prime Minister Yingluck Shinawatra, right, at Thai Government House in Bangkok, Thailand, Sunday, Nov. 18, 2012. (AP Photo/Pablo Martinez Monsivais)

Members of the 2012 Women's Olympic gymnastics team, from left, McKayla Maroney of Long Beach, Calif.;, Jordyn Wieber of DeWitt, Mich.;, and Gabby Douglas of Virginia Beach, Va.; walk in the colonnade of the White House in Washington, Thursday, Nov. 15, 2012, to watch President Barack Obama depart from the South Lawn. Obama had meet with the team earlier in private meeting in the Oval Office.(AP Photo/Pablo Martinez Monsivais)

With the Wisconsin state capitol dome as a backdrop, President Barack Obama waves to the press as he greets supporters at a campaign event, Monday, Nov. 5, 2012, in downtown Madison, Wis. (AP Photo/Carolyn Kaster)

Members of an honor guard carry the casket of former Democratic U.S. Sen. and three-time presidential candidate George McGovern into the Washington Pavilion of Arts and Science in Sioux Falls, S.D., for the funeral service, Friday, Oct. 26, 2012. McGovern died Sunday in his native South Dakota at age 90. (AP Photo/Nati Harnik)

A silhouetted President Barack Obama gestures while speaking at a campaign event at Delray Beach Tennis Center, Tuesday, Oct. 23, 2012 in Delray Beach, Fla., the day after the last presidential debate against Republican Presidential candidate, former Massachusetts Gov. Mitt Romney. The president is making campaign stops in Florida and Ohio today. (AP Photo/Pablo Martinez Monsivais)

Italian Nativity scenes designer Genny Di Virgilio puts the final touches on two statuettes depicting President Barack Obama, right, and Republican rival Mitt Romney in his shop in Naples, Italy, Monday, Oct. 22, 2012, hours ahead of their third and final presidential debate in Boca Raton, Florida. (AP Photo/Salvatore Laporta)

Republican vice presidential candidate, Rep. Paul Ryan, R-Wis., helps his son Sam out of the car as he arrives for breakfast at Josie's restaurant, Friday, Oct. 12, 2012, at Centre College in Lexington, Ky. (AP Photo/Mary Altaffer)

House Oversight Committee Chairman Rep. Darrell Issa, R-Calif., delivers his opening statement on Capitol Hill in Washington, Wednesday, Oct. 10, 2012, during the committee's hearing on the attack on the American consulate in Benghazi, Libya that resulted in the death of U.S. Ambassador Christopher Stevens. (AP Photo/J. Scott Applewhite)

This image released by ABC shows Ann Romney, wife of Republican presidential hopeful Mitt Romney during a cooking segment on "Good Morning America," Wednesday, Oct. 10, 2012 in New York. Romney served as a guest co-host on the popular morning show. (AP Photo/ABC, Ida Mae Astute)

U.S. Sen. Scott Brown, R-Mass., right, faces reporters as former New Jersey Governor Christine Todd Whitman, left, looks on during a news conference at a banquet hall in Boston's Dorchester neighborhood, Tuesday, Oct. 9, 2012. Whitman, who served as governor of New Jersey from 1994-2001, offered her endorsement of Brown in his run against Democratic challenger Elizabeth Warren for the Senate seat. (AP Photo/Steven Senne)

Trader Joseph Lawler, center, works on the floor of the New York Stock Exchange Tuesday, Oct. 9, 2012. Another dire prediction about global economic growth is sending stocks lower on Wall Street in early trading on Tuesday.(AP Photo/Richard Drew)

House Intelligence Committee Chairman Rep. Mike Rogers, R-Mich., left, and and the committee's ranking Democrat, Rep. C.A. "Dutch" Ruppersberger, D-Md., release a report on a yearlong probe of China's two leading technology firms, Huawei Technologies Ltd. and ZTE Corp., warning they pose a major security threat to the US and that the U.S. government systems and private U.S. companies should avoid business with them, Monday, Oct. 8, 2012, on Capitol Hill in Washington. (AP Photo/J. Scott Applewhite)

Jonathan Corpina, left, works with fellow traders on the floor of the New York Stock Exchange Friday, Oct. 5, 2012. Stocks are rising in early trading on Wall Street after the government reported that the U.S. unemployment rate fell below 8 percent for the first time in almost four years.(AP Photo/Richard Drew)

Voters wait in line to pick up their ballots inside the Hamilton County Board of Elections after it opened for early voting, Tuesday, Oct. 2, 2012, in Cincinnati. Ohioans can cast an early ballot by mail or in person beginning Tuesday for the Nov. 6 election. (AP Photo/Al Behrman)

Nigerian widow Esther Kiobel, a plaintiff in Kiobel v. Royal Dutch Petroleum, cries as she speaks outside the Supreme Court in Washington, Monday, Oct. 1, 2012. Standing with her second from left is Brad Weikel with EarthRights International. (AP Photo/Carolyn Kaster)

United States Secretary of State Hillary Rodham Clinton is kissed by her husband, former U.S. President Bill Clinton, as he welcomes her to the podium at the Clinton Global Initiative, Monday, Sept. 24, 2012 in New York. (AP Photo/Mark Lennihan)

Rep. Maxine Waters, D-Calif., right, smiles at her husband, Sidney Williams, a former U.S. ambassador to the Bahamas, during a House Ethics Committee hearing on Capitol Hill in Washington, Friday, Sept. 21, 2012. Waters, a senior Democrat on the Financial Services Committee, is fighting allegations that she steered a $12 million federal bailout to a bank where her husband owns stock. (AP Photo/J. Scott Applewhite)

Members of the Joint Congressional Committee on Inaugural Ceremonies, Senate Majority Leader Harry Reid, D-Nev., left, Speaker of the House John Boehner, R-Ohio, center left, House Majority Leader Eric Cantor, R-Va., center right, and House Democratic Leader Nancy Pelosi, D-Calif., right, hammer nails into a plank during the First Nail Ceremony for the official launch of construction of the Inaugural platform where the President of the United States will take the oath of office on the West Front of the U.S. Capitol in Washington, Thursday, Sept. 20, 2012.(AP Photo/Cliff Owen)

Robert Stephen Beecroft listens during a Senate Foreign Relations committee hearing on his nomination to be ambassador to Iraq on Capitol Hill on Wednesday, Sept. 19, 2012 in Washington. (AP Photo/ Evan Vucci)

FILE - In this Dec. 19, 2011 file photo, Mei Xiang, the female giant panda at the Smithsonian's National Zoo in Washington, eats breakfast. Mei Xiang has given birth to a cub yesterday following five consecutive pseudopregnancies in as many years.(AP Photo/Susan Walsh)

President Barack Obama and Secretary of State Hillary Rodham Clinton walk back to their seats after speaking during the Transfer of Remains Ceremony, Friday, Sept. 14, 2012, at Andrews Air Force Base, Md., marking the return to the United States of the remains of the four Americans killed this week in Benghazi, Libya. (AP Photo/Carolyn Kaster)

President Barack Obama, accompanied by Secretary of State Hillary Rodham Clinton, meets with State Department personnel in the courtyard of the State Department in Washington, Wednesday, Sept. 12, 2012, after speaking at the White House concerning the recent deaths of Americans in Libya. (AP Photo/Alex Brandon)

President Barack Obama, first lady Michelle Obama, and members of the White House staff pause during a moment of silence to mark the 11th anniversary of the Sept, 11th, Tuesday, Sept. 11, 2012, on the South Lawn of the White House in Washington. (AP Photo/Pablo Martinez Monsivais)

U.S. soldiers, part of the NATO- led International Security Assistance Force (ISAF) salute during a hand over ceremony of U.S.- run prison to Afghan government in Bagram north of Kabul, Afghanistan, Monday, Sept. 10, 2012. U.S. officials handed over formal control of Afghanistan's only large-scale U.S.-run prison to Kabul on Monday, even as disagreements between the two countries over the thousands of Taliban and terror suspects held there marred the transfer. (AP Photo/Musadeq Sadeq)

Air Force One, with President Barack Obama aboard, taxis on the runway under a heavy rain before departing at Andrews Air Force Base, Md., Wednesday, Sept. 5, 2012, en route to Charlotte, N.C. for the Democratic National Convention.(AP Photo/Jose Luis Magana)

The youngest Texas Delegate keeps herself entertained waiting for the start of the Democratic National Convention in Charlotte, NC on Tuesday, September 4, 2012.(Ralf-Finn Hestoft)

Marco Rubio speaks to the reporters on the floor of the Republican National Convention in Tampa, Florida on Wednesday, August 29, 2012.(Ralf-Finn Hestoft)

Maryland delegates Ellen Sauerbrey, left, George Engelbach, and Audrey Scott pose together for a picture on the floor at the Republican National Convention on Tuesday, Aug. 28, 2012.(AP Photo/Jae C. Hong)

John Boehner and Diane Sawyer on the floor of the Tampa Bay Times Forum on Monday, August 27, 2012.(Chet Susslin)

Women relax on the border of a fountain in Milan, Italy, Wednesday Aug. 22, 2012. A heat wave has struck Italy with temperatures rising up to 38 degrees Celsius (100.40 Fahrenheit) in some parts of the country.(AP Photo/Antonio Calanni)

A man rides his bicycle through a waterlogged street during a monsoon shower in Jammu, India, Tuesday, Aug. 21, 2012. The monsoon rains which usually hit India from June to September are crucial for farmers whose crops feed hundreds of millions of people.(AP Photo/Channi Anand)

Party balloons sit on the floor of the Cross Hall of the White House in Washington, Monday, Aug. 20, 2012, in preparations for the Kids' "State Dinner," hosted by first lady Michelle Obama. (AP Photo/Pablo Martinez Monsivais)

Yadira Garcia, left, of the Arizona Dream Act Coalition, holds up a sign in protest as she joins young immigrants as they sit in the waiting area of Arizona Gov. Jan Brewer on Thursday, Aug. 16, 2012, in Phoenix.
(AP Photo/Ross D. Franklin)

As wind turbines turn in the distance, President Barack Obama changes direction as he walks from a podium after speaking at the Heil family farm , Tuesday, Aug. 14, 2012, in Haverhill, Iowa, during a three day campaign bus tour through Iowa. ((AP Photo/Carolyn Kaster)

Taxi driver Richard Meid waits for a fare in front of the British Museum during the 2012 Summer Olympics,Wednesday, Aug. 8, 2012.(AP Photo/Jae C. Hong)

A man slides down a hill after a rare snowfall in Johannesburg, South Africa, on Tuesday, Aug. 7, 2012. Temperatures dropped to below freezing Tuesday morning as snow flurries blew through South Africa's Johannesburg.(AP Photo/Themba Hadebe)

People burn incense and pray on Monday, August 6, 2012 in front of the cenotaph dedicated to the victims of Hiroshima as they mark the 67th anniversary of the world's first atomic bombing.(AP Photo/Itsuo Inouye)

Jim Fortier, left, and Mark Toomajian, kiss as they join about two dozen members of gay rights groups and others protesting outside the Decatur, Ga., Chick-fil-A restaurant Friday, Aug. 3, 2012. Gay rights activists plan kiss demonstrations at Chick-fil-A stores Friday, just days after the company set a sales record when customers flocked to the restaurants to show support for the fast-food chain owner's opposition to gay marriage. (AP Photo/David Tulis)

Jan Ebeling of the United States, waves to the crowd after riding Rafalca in the equestrian dressage competition at the 2012 Summer Olympics, Thursday, Aug. 2, 2012, in London. Rafalca is co-owned by Ann Romney, the wife of U.S. Republican presidential candidate Mitt Romney. (AP Photo/David Goldman)

A man holding a pole stay on the mound of garbage washed ashore by big waves as others look for recyclable materials Wednesday, Aug. 1, 2012 along Roxas Blvd. in Manila, Philippines. The slow-moving Typhoon Saola killed at least 12 people and displaced 154,000 in the Philippines. (AP Photo/Pat Roque)

Andy Roddick of the United States dives for the ball during his match against Martin Klizan of Slovakia at the All England Lawn Tennis Club in Wimbledon, London at the 2012 Summer Olympics, Monday, July 30, 2012. (AP Photo/Elise Amendola)

U.S. Gen. James D. Thurman, the commander of U.S. Forces Korea, fourth from right, poses with Neutral Nations Supervisory Commission, United Nations Forces and South Korean officers after a ceremony marking the 59th anniversary of the signing of the armistice agreement that ended the Korean War on July 27, 1953, at the border villages of Panmunjom, South Korea, Friday, July 27, 2012.(AP Photo/Ahn Young-joon)

A rower practices before the 2012 Summer Olympics, Tuesday, July 24, 2012, in Eton Dorney. Opening ceremonies for the games will be held Friday, July 27.(AP Photo/Natacha Pisarenko)

People gather at the scene of a bomb attack in Baghdad's Shiite enclave of Sadr City, Iraq, Monday, July 23, 2012. An onslaught of bombings and shootings killed scores of people across Iraq on Monday, in the nation's deadliest day so far this year. The attacks come days after the leader of al-Qaida in Iraq declared a new offensive seeking to re-assert its might in the security vacuum left by the departing Americans. (AP Photo/Karim Kadim)

Chinese people walk past a flood damaged vehicle sitting on the bricks at a village in Fangshan district of Beijing, China Monday, July 23, 2012. As China's flood-ravaged capital dealt with the aftermath of the heaviest rain in six decades Monday, including the deaths of 37 people, questions were being raised about whether the city's push for modernization came at the expense of basic infrastructure such as drainage networks.(AP Photo/Andy Wong)

Judy Goos, second from left, hugs her daughters friend, Isaiah Bow, 20, while eye witnesses Emma Goos, 19, left, and Terrell Wallin, 20, right, gather outside Gateway High School where witness were brought for questioning Friday, July 20, 2012 in Denver. A gunman wearing a gas mask set off an unknown gas and fired into a crowded movie theater at a midnight opening of the Batman movie "The Dark Knight Rises," killing at least 12 people and injuring at least 50 others, authorities said. (AP Photo/Barry Gutierrez)

Former South African President Nelson Mandela as he celebrates his birthday with family in Qunu, South Africa, Wednesday, July 18, 2012. Across the country, and even abroad, people are doing good deeds to honor the country's most famous statesman on his 94th birthday Wednesday.(AP Photo/Schalk van Zuydam)

Federal Reserve Board Chairman Ben Bernanke pauses as he arrives to give a semiannual report to the Senate Banking Committee, Tuesday, July 17, 2012, on Capitol Hill in Washington. Bernanke's testimony comes as job growth has slumped, manufacturing has weakened and consumers have grown more cautious about spending (AP Photo/Carolyn Kaster)

President Barack Obama speaks at a campaign event at the Cincinnati Music Hall in Cincinnati, Monday, July 16, 2012. Obama is spending the day campaigning in Cincinnati. (AP Photo/Susan Walsh)

President Barack Obama walks over to greet people after arriving at Norfolk International Airport in Norfolk, Va., Friday, July 13, 2012.(AP Photo/Susan Walsh)

A lady uses her smartphone to photograph a Water Lily at the Singapore Garden Festival on Thursday July 12, 2012 in Singapore.(AP Photo/Wong Maye-E)

U.S. Secretary of State Hillary Rodham Clinton, left, is greeted at the Ho Phra Keo Temple Wednesday, July 11, 2012 in Vientiane, Laos.(AP Photo/Brendan Smialowski)

An Indian child dives into the River Ganges in Varanasi, India, Tuesday, July 10, 2012.(AP Photo/Rajesh Kumar Singh)

Bosnian Muslim women pray near the coffin of a relative, among 520 newly identified Srebrenica victims, at the Potocari memorial cemetery near Srebrenica on Monday, July 9, 2012. The 520 victims will be buried at a memorial center near Srebrenica on the 17th anniversary of the massacre of 8,000 men and boys.(AP Photo/Amel Emric)

A Pakistani man sleeps on top of an oil tanker, which was used to transport NATO fuel supplies to Afghanistan, while parked with other tankers in Karachi, Pakistan, Tuesday, July 3, 2012. The Obama administration said Tuesday that Pakistan was reopening its supply lines into Afghanistan, after the U.S. belatedly issued an apology for the November killing of 24 Pakistani troops in a NATO airstrike.(AP Photo/Fareed Khan)

Giovanny Alvarez, a letter carrier for the U.S. Postal Service, leaves after delivering mail to a residence in Washington, Monday, July 2, 2012, damaged by the powerful storm that swept through the region Friday.(AP Photo/Evan Vucci)

Ron Kirby, of Alexandria, Va. talks to reporters after the Supreme Court ruled to uphold key parts of the Arizona immigration law on Monday, June 25, 2012.(Chet Susslin)

An Indian shouts for water as a shanty town is engulfed in flames in New Delhi, India, Friday, June 22, 2012. A fire swept through a slum in the Indian capital on Friday, destroying hundreds of shanties.(AP Photo/Kevin Frayer)

Girls leap through a wall of water at Yards Park in Washington, on Thursday, June 21, 2012. Heat index values are expected to exceed 100 degrees across the northeast on Thursday, according to the National Weather Service.(AP Photo/Jacquelyn Martin)

Thousands of yoga enthusiasts convene in New York's Times Square to mark the summer solstice, Wednesday, June 20, 2012. Temperatures are expected to be near 100 degrees Wednesday.(AP Photos/Mark Lennihan)

Two Egyptians argue during a protest near the Egyptian Parliament in Cairo, Egypt on Tuesday, June 19, 2012.(AP Photo/Manu Brabo)

A Free Syrian Army fighter fires his weapon during clashes with Syrian troops near Idlib, Syria Friday, June 15, 2012. (AP Photo)

An Egyptian boy peers out of barbed wire, his face painted with the number 25, the date of the Egyptian revolution, during a protest in front of the Supreme Constitutional Court in Cairo, Egypt, Thursday June 14, 2012. Egypt's highest court has ruled that Hosni Mubarak's last prime minister can stay in the presidential race. (AP Photo/Amr Nabil)

President Barack Obama visits a Kenny's BBQ restaurant with Army First Lt. William Edwards, a 2012 Military Fatherhood Award Winner, second from left, and Nurney Mason owner of Mason's Barber Shop, left back to camera, Wednesday, June 13, 2012, in Washington. (AP Photo/Carolyn Kaster)

This image made available by LOCOG shows Kirsty Wade holding the Olympic Flame as a lone piper plays at the Calanais Standing Stones in Callanish on the Isle of Lewis, Scotland as the sun rises on Day 24 of the London 2012 Olympic Torch Relay, Monday, June 11, 2012.(AP Photo/Danny Lawson/LOCOG)

Texas Gov. Rick Perry speaks during the Texas Republican Convention in Fort Worth, Texas, Thursday, June 7, 2012 . Perry has provoked boos at the state Republican Convention by repeating his support for U.S Senate candidate David Dewhurst. Perry said Thursday that the country needs more conservatives in Washington like his friend Dewhurst, who has been lieutenant governor since 2003. Dewhurst and former state Solicitor General Ted Cruz meet in a runoff election July 31 for the Republican nomination to replacing retiring Sen. Kay Bailey Hutchison.(AP Photo/LM Otero)

The space shuttle Enterprise is makes the final leg of its journey to its new Manhattan home on the flight deck of the Intrepid Sea, Air & Space Museum. Wednesday, June 6, 2012. The space shuttle Enterprise is hoisted by crane onto the flight deck of the Intrepid Sea, Air & Space Museum, Wednesday, June 6, 2012 in New York. The Enterprise comes to New York as part of NASA's decision to end the shuttle program after 30 years. It is scheduled to open to the public in mid-July. (AP Photo/Richard Drew)

An Egyptian woman chants slogans against Egyptian presidential candidate Ahmed Shafiq at a protest in Tahrir Square decrying the result of the first round of voting in the Egyptian presidential election in Cairo, Egypt, Friday, June 1, 2012. Several hundred protesters rallied Friday in Cairo's Tahrir Square, the birthplace of the Egyptian uprising.(AP Photo/Fredrik Persson)

Myanmar opposition leader Aung San Suu Kyi waves while leaving a community center in Mahachai, Samut Sakhon Province, Thailand on Wednesday, May 30, 2012. Kicking off her first trip abroad in nearly a quarter-century, Suu Kyi offered encouragement Wednesday to impoverished Myanmar migrants whose flight to neighboring Thailand is emblematic of the devastation wrought on her homeland by decades of misrule.(AP photo/Sakchai Lalit)

In this photo provided by the Syrian official news agency SANA, Syrian President Bashar Assad, right, meets with Kofi Annan, the U.N.-Arab League Joint Special Envoy for Syria, in Damascus, Syria. The meeting Tuesday followed a massacre in Houla, Syria, last week in which more than 100 people were killed, some of them women, children and entire families gunned down in their own homes. Following the meeting, Annan told reporters "We are at a tipping point." (AP Photo/SANA)

President Barack Obama wipes sweat from his face as he speaks during a Memorial Day ceremony at the Vietnam Veterans Memorial Wall to commemorate the 50th anniversary of the Vietnam War, Monday, May 28, 2012, in Washington.(AP Photo/Carolyn Kaster)

Facebook founder, Chairman and CEO Mark Zuckerberg, center, rings the opening bell of the Nasdaq stock market, Friday, May 18, 2012, from Facebook headquarters in Menlo Park, Calif. The social media company priced its IPO on Thursday at $38 per share, and beginning Friday regular investors will have a chance to buy shares.(AP Photo/Nasdaq via Facebook, Zef Nikolla)

A village boy leads his goat past a parched pond on the outskirts of the eastern Indian city of Bhubaneswar, India, Thursday, May 17, 2012.(AP Photo/Biswaranjan Rout)

Former presidential candidate and Sen. John Edwards, right, arrives at a federal courthouse with his father, Wallace Edwards, in Greensboro, N.C., May 16, 2012.(AP Photo/Gerry Broome)

U.S. astronaut Joseph Acaba, left, Russian cosmonauts Gennady Padalka, center, and Sergei Revin, right, crew members of the mission to the International Space Station, prior to the launch of a Soyuz-FG rocket at the Russian leased Baikonur cosmodrome, in Kazakhstan, Tuesday, May 15, 2012.(AP Photo/Mikhail Metzel)

The Dalai Lama leaves the St. Paul's Cathedral in London with Bishop of London Richard Chartres, right, and St.Paul's Cathedral Canon Pastor Reverend Michael Colclough after receiving the 2012 Templeton Prize on Monday, May 14, 2012.(AP Photo/Sang Tan)

Pakistani children who fled their villages with their families due to fighting between security forces and militants in Pakistan's tribal area of Bajur, enjoy a ride on a merry-go-round at a makeshift entertainment park set up in a slum area on the outskirts of Islamabad, Pakistan, Friday, May 11, 2012.(AP Photo/Muhammed Muheisen)

A high priestess, holds a torch with the Olympic flame during the lighting of the flame ceremony on Thursday, May 10, 2012, in Ancient Olympia, Greece. The flame will be carried from the birthplace of the Ancient Olympics to London, where the 2012 Summer Games will take place from July 27-Aug. 12.(AP Photo/Petros Giannakouri)

Sen. Richard Lugar responds to a question outside of a voting location Tuesday, May 8, 2012, in Greenwood, Ind. Lugar is being challenged by two-term state Treasurer Richard Mourdock.(AP Photo/Darron Cummings)

President-elect Francois Hollande, left, waves as he arrives at the Socialist Party headquarters in Paris Monday May 7, 2012. France handed the presidency to leftist Hollande, a champion of government stimulus programs who says the state should protect the downtrodden, a victory that could deal a death blow to the drive for austerity that has been the hallmark of Europe in recent years. (AP Photo/Michel Spingler)

Christine McCoy, from Dubuque, Iowa looks over the paddock before the 138th running of the Kentucky Oaks horse race at Churchill Downs Friday, May 4, 2012, in Louisville, Ky.(AP Photo/Charlie Riedel)

Du Yanling wears sunglasses, similar to those of blind Chinese activist Chen Guangcheng, over his normal glasses outside the hospital where Chen is recuperating in Beijing, China, Thursday, May 3, 2012. Du said he is there to show support for Chen who fled persecution by local officials in his rural town and sought refuge in the U.S. Embassy in Beijing for six days.(AP Photo/Ng Han Guan)

President Barack Obama returns a salute as he steps off the Marine One helicopter upon his arrival on the South Lawn of the White House in Washington, Wednesday, May, 2, 2012. Obama was returning from an unannounced trip to Afghanistan.(AP Photo/Pablo Martinez Monsivais)

President Barack Obama and Afghan President Hamid Karzai sign a strategic partnership agreement at the presidential palace in Kabul, Afghanistan, Wednesday, May 2, 2012.(AP Photo/Charles Dharapak)

Space shuttle Enterprise, riding on the back of the NASA 747 Shuttle Carrier Aircraft, cruises over the Hudson river, Friday, April 27, 2012 in New York. Enterprise is eventually going to make its new home in New York City at the Intrepid Sea, Air and Space Museum. (AP Photo/Mary Altaffer)

Beef vendors wait for customers at their stall at a market in Jakarta, Indonesia, Thursday, April 26, 2012. Indonesia became the first country to suspend imports of U.S. beef Thursday following the discovery this week of an American dairy cow infected with mad cow disease. (AP Photo/Tatan Syuflana)

Election worker Khalid Battle reads a book as he waits for voters to cast their ballots in Pennsylvania primary election at Memorial Gospel Crusades Church, Tuesday, April 24, 2012, in Philadelphia. Voters in New York, Connecticut, Delaware, Rhode Island and Pennsylvania were heading to the polls on Tuesday for primary elections.
(AP Photo/Matt Rourke)

A group of U.S. Army veterans who took part in liberating Nazi death camps walk through the entrance gate of the former Nazi Death Camp Auschwitz-Birkenau, in Oswiecim, southern Poland, Thursday, April 19, 2012, as they take part in the annual March of the Living to commemorate Holocaust victims. Walking with the flag is Frederick Carrier, one of the U.S. soldiers who helped liberate Buchenwald.
(AP Photo/Alik Keplicz)

Caption from the Los Angeles Times: "A soldier from the Army's 82nd Airborne Division with the body of an Afghan insurgent killed while trying to plant a roadside bomb. The photo is one of 18 provided to The Times of U.S. soldiers posing with corpses." Check out other times soldiers have been caught behaving badly here.(Photo published by the Los Angeles Times)

A soldier, part of the NATO forces, carries a sniffing dog after a gun battle in Kabul, Afghanistan, Monday, April 16, 2012. A brazen, 18-hour Taliban attack on the Afghan capital ended early Monday when insurgents who had holed up overnight in two buildings were overcome by heavy gunfire from Afghan-led forces and pre-dawn air assaults from U.S.-led coalition helicopters.(AP Photo/Musadeq Sadeq)

A supporter of Pakistani religious group Jamaat-ud-Dawwa stands on a representation of a U. S. flag before set it on fire during a protest rally in Karachi, Pakistan on Friday, April 6, 2012. Nation-wide protests condemned the United States for putting US$10 million bounty on Hafiz Saeed, founder of the Pakistani militant group Lashkar-e-Taiba. (AP Photo)

President Barack Obama speaks in the Rose Garden of the White House in Washington, Thursday, March 29, 2012, to urge Congress to eliminate tax breaks for oil and gas companies.
(AP Photo/Pablo Martinez Monsivais)

March 28: People file out of the Supreme Court after the morning session hearing arguments on the Affordable Care Act on Wednesday, the last day of hearings. (Chet Susslin)

March 20: Thunderstorms announce the coming of spring on Capitol Hill in Washington on Tuesday.(AP Photo/J. Scott Applewhite)

March 17: President Obama drinks a Guinness with his ancestral cousin from Moneygall Ireland Henry Healy, center, and the owner of the pub in Moneygall Ireland, Ollie Hayes, right, at The Dubliner Restaurant and Pub in Washington on Saturday, St. Patrick's Day.(AP Photo/Carolyn Kaster)

March 16: Actor George Clooney, center, and Rep. Jim Moran, D-Va., left, are led to a police vehicle after being arrested during a protest at the Sudan Embassy in Washington on Friday.(AP Photo/Cliff Owen)

March 15: Rick Santorum speaks to an audience at a town hall meeting in San Juan, Puerto Rico, on Wednesday.(AP Photo/Dennis M. Rivera Pichardo)

March 14: British Prime Minister David Cameron and President Obama reach to shake hands during their joint news conference in the Rose Garden of the White House on Wednesday.(Pablo Martinez Monsivais/AP)

March 13: President Obama stands with Commerce Secretary John Bryson, left, and U.S. Trade Representative Ron Kirk, as he makes a statement regarding China and trade on Tuesday in the Rose Garden of the White House.(Charles Dharapak/AP)

March 12: Comedian Jeff Foxworthy introduces Mitt Romney at a campaign stop at the Whistle Stop Cafe in Mobile, Ala.(AP Photo/ John David Mercer)

March 8: Secretary of State Hillary Rodham Clinton and first lady Michelle Obama present the 2012 International Women of Courage Award to Safak Pavey of Turkey, on the 101st Anniversary of International Women's Day on Thursday at the State Department.(Charles Dharapak/AP)

March 7: President Obama is reflected in the sunglasses of a member of the military as he greets people on the tarmac upon his arrival at Charlotte Douglas International airport in Charlotte, N.C., on Wednesday.(Pablo Martinez Monsivais/AP)

March 6: President Obama pauses during a news conference in the James Brady Press Briefing Room of the White House on Tuesday.(Pablo Martinez Monsivais/AP)

Feb. 24: Mitt Romney addresses the Detroit Economic Club at Ford Field in Detroit on Friday.(Carlos Osorio/AP)

Feb. 23: Mitt Romney speaks at the Associated Builders and Contractors National Meeting at the Arizona Biltmore Hotel in Phoenix on Thursday.(Gerald Herbert/AP)

Feb. 22: President Obama heads to the West Wing of the White House in Washington with Senior White House adviser Valerie Jarrett, left, and White House Chief of Staff Jacob Lew, right, after returning from a groundbreaking ceremony on Wednesday.(Susan Walsh/AP)

Feb. 21: President Obama, accompanied by Vice President Joe Biden on Tuesday talks about the importance of the payroll-tax cut and jobless-benefits extension bill that Congress passed last week in the Eisenhower Executive Office Building.(J. Scott Applewhite/AP)

Feb. 16: A worker in hardhat, and others, listen as Republican presidential candidate Mitt Romney speaks at an economic round table at National Galvanizing in Monroe, Mich., on Thursday.(Gerald Herbert/AP)

Feb. 15: Marine One, with President Obama aboard, departs from the South Lawn of the White House on Wednesday, enroute to Andrews Air Force Base, Md.(Carolyn Kaster/AP)

Feb. 10: A woman wearing a hat adorned with tea bags and the name Newt listens as Rick Santorum speaks at the 2012 Conservative Political Action Conference in Washington on Friday.(Chet Susslin)

Feb. 9: President Obama speaks about a mortgage settlement on Thursday in the Eisenhower Executive Office building on the White House complex in Washington.(Susan Walsh/AP)

Feb. 8: Employees of Jergens Inc., continue to work on the assembly line as Republican presidential candidate and former House Speaker Newt Gingrich speaks during a campaign stop on Wednesday in Cleveland, Ohio.(Evan Vucci/AP)

Feb. 2: Donald Trump greets Republican presidential candidate and former Massachusetts Gov. Mitt Romney after announcing his endorsement of Romney during a news conference on Thursday in Las Vegas.(Julie Jacobson/AP)

Feb. 1: President Obama pauses as he holds up a proposed mortgage application form at the James Lee Community Center in Falls Church, Va., on Wednesday.(Cliff Owen/AP)

Jan. 27: President Obama greets supporters after his speech at the University of Michigan in Ann Arbor, Mich., on Friday.(Carlos Osorio/AP)

Jan. 26: First Lady Michelle Obama gestures during a visit to a Latin grocery store in Tampa, Fla., on Thursday.(Chris O'Meara/AP)

Jan. 25: This video image provided by House Television shows Rep. Gabrielle Giffords, D-Ariz. on the floor of the House on Wednesday. Giffords resigned from the House on Wednesday amid tears, tributes and standing ovations, more than a year after she was gravely wounded by a would-be assassin.(AP Photo/House Television)

Jan. 24: Republican presidential candidate and former House Speaker Newt Gingrich, accompanied by his wife Callista, leave the Tick Tock Restaurant on Tuesday in St. Petersburg, Fla.(Matt Rourke/AP)

Jan. 21: Republican presidential candidate and former House Speaker Newt Gingrich, displays an autographed sign during a campaign stop at Tommy’s Country Ham House, on Saturday in Greenville, S.C., on South Carolina's Republican primary election day.(Matt Rourke/AP)

Jan. 20: The shadow of Republican presidential candidate Rep. Ron Paul, R-Texas, is cast against the South Carolina state flag as he waits to be introduced at a campaign rally in an airplane hanger on Friday in North Charleston, S.C.(David Goldman/AP)

Jan. 19: President Obama speaks about tourism and travel on Thursday along Main Street USA at the Walt Disney World Resort in Lake Buena Vista, Fla.(Haraz N. Ghanbari/AP)

January 18: Secretary of State Hillary Rodham Clinton laughs after receiving a Los Angeles Lakers basketball jersey as a gift from global cultural ambassador and former NBA basketball star Kareem Abdul-Jabbar on Wednesday at the State Department in Washington. Abdul-Jabbar will travel the world to engage a generation of young people to help promote diplomacy.(Jacquelyn Martin/AP)

Jan. 11: President Obama smiles as he greets U.S. Trade Representative Ron Kirk during a roundtable meeting on Insourcing American Jobs on Wednesday in the Old Executive Office Building.(Pablo Martinez Monsivais/AP)

Jan. 10: Voters cast ballots in the gym of the Webster School in Manchester, N.H., on Tuesday.(Evan Vucci/AP)

Jan. 6: Republican presidential candidate Rick Santorum takes questions from the audience as he campaigns at the Keene Public Library in Keene, N.H., on Friday.(Charles Dharapak/AP)

Jan. 5: Sen. John McCain, R-Ariz., listens at left as Republican presidential candidate and former Massachusetts Gov. Mitt Romney speaks at a Boys and Girls Club in Salem, N.H., on Thursday.(Matt Rourke/AP)

Jan. 4: Rep. Michele Bachmann, R-Minn., joined by husband Marcus, left, family and friends, announces that she will end her campaign for president on Wednesday in West Des Moines, Iowa.(Chris Carlson/AP)

Jan. 3: Republican presidential candidate and former Pennsylvania Sen. Rick Santorum waits to be introduced at a campaign stop at Valley High School in West Des Moines, Iowa, on Tuesday.(Charlie Riedel/AP)

Dec. 28: Former House Speaker Newt Gingrich and his wife Callista greet Tonya Tran of Natural Nails salon during a campaign stop at the Southbridge Mall in Mason City, Iowa, on Wednesday.(CHARLES DHARAPAK/AP)

Dec. 27: Republican presidential candidate and former Pennsylvania Sen. Rick Santorum speaks during a town hall meeting at the GOP Headquarters in Fort Dodge, Iowa, on Tuesday.(Charlie Neibergall/AP)

Dec. 25: President Obama gets a mouth and face full of fingers from Cooper Wall Wagner, 8 months, as he poses for a photo with Cooper and his parents, Captain Greg and Meredith Wagner, while visiting members of the military during Christmas dinner at Anderson Hall on Marine Corps Base Hawaii on Sunday in Kaneohe, Hawaii.(Carolyn Kaster/AP)

Dec. 23: Former President Bill Clinton, center is flanked by his wife, Secretary of State Hillary Clinton and former Secretary of State Madeleine Albright during the state funeral of former Czech President Vaclav Havel in the St. Vitus Cathedral in Prague, Czech Republic, on Friday.(Petr David Josek, Pool/AP)

Dec. 22: President Obama speaks during am event in the South Court Auditorium at the White House complex on Thursday. The president was flanked at the White House by several people who commented on Twitter about how they would be impacted if the tax cuts were not extended.>(Carolyn Kaster/AP)

Dec. 21: President Obama shops for Christmas presents with his dog Bo at Petsmart in Alexandria, Va., on Wednesday.(Kevin Dietsch/UPI)

Dec. 20: Office of Management and Budget Director Jacob Lew, center, is assisted by Rabbi Levi Shemtov, second left, and Rabbi Abraham Shemtov, right as they light the National Hanukkah Menorah during a ceremony on The Ellipse in Washington on Tuesday, marking the first night of Hanukkah.(Manuel Balce Ceneta/AP)

Dec. 15: Secretary of Defense Leon Panetta speaks in Baghdad on Thursday during ceremonies marking the end of the U.S. military's mission in Iraq.(Khalid Mohammed/AP)

Dec. 14: President Obama, accompanied by first lady Michelle Obama, speaks to troops at Fort Bragg, N.C., on Wednesday.(GERRY BROOME/AP)

Dec. 13: House Majority Leader Eric Cantor, R-Va., accompanied by fellow Republican leaders, meet with reporters on Capitol Hill in Washington on Tuesday before a crucial vote on a GOP effort to renew an extension of the payroll-tax cut.(J. Scott Applewhite/AP)

Dec. 8: Republican presidential candidate Texas Gov. Rick Perry listens to Catcher Jones, 7, of Greenville, S.C., as Jones tells him about his desire to become President of the United States and to become an Eagle Scout on Thursday on the U.S.S. Yorktown in Charleston, S.C.(Alice Keeney/AP)

Dec. 2: President Obama listens as former President Bill Clinton speaks at a building under construction in Washington on Friday.(Carolyn Kaster/AP)

Dec. 1: Myanmar President Thein Sein, right, shakes hands with Secretary of State Hillary Clinton during a meeting at the President's Office in Naypyidaw, Myanmar on Thursday.(Saul Loeb, Pool/AP)

Nov. 30: Texas Gov. Rick Perry addresses the New Hampshire legislature during a campaign stop at the Statehouse in Concord, N.H., on Wednesday.(Jim Cole/AP)

Nov. 29: Gen. Lloyd Austin, the top U.S. commander in Iraq, left, looks on as Vice President Joe Biden, right, shakes hands with the U.S. Ambassador to Iraq James Jeffrey after he arrived, in Baghdad, Iraq on Tuesday. Biden arrived on a surprise visit to Iraq late Tuesday in a trip designed to chart a new relationship between the two countries.(Khalid Mohammed/AP)

President Obama's dog Bo inspects the White House Christmas tree as it arrives at the North Portico, Nov. 25, in Washington. The 19-foot-tall balsam fir is from a farm near Neshkoro, Wis.(AP Photo/J. Scott Applewhite)

Nov. 23: President Obama, with daughters Sasha and Malia, pardons Liberty, a 19-week old, 45-pound turkey,on Wednesday on the North Portico of the White House.(Lauren Rock/AP)

Nov. 22: President Obama greets audience members before he spoke about jobs on Tuesday at Manchester High School Central in Manchester, N.H.(Charles Dharapak/AP)

Nov. 18: President Obama poses for a photograph with Indonesian President Susilo Bambang Yudhoyono, center, and his wife, Kristiani, upon his arrival for a gala diner at the Association of Southeast Asian Nations (ASEAN) Summit in Nusa Dua, Bali, Indonesia, on Friday.(Romeo Ranoco, Pool/AP)

Nov. 17: Energy Secretary Steven Chu testifies before the House Energy and Commerce Oversight and Investigations Subcommittee hearing on Solyndra on Thursday.(Chet Susslin)

Nov. 15: Occupy Wall Street protesters clash with police at Zuccotti Park after being ordered to leave their longtime encampment in New York on Tuesday.(Craig Ruttle/AP)

Nov. 11: President Obama, accompanied by Maj. Gen. Michael S. Linnington, Commander of the U.S. Army Military District of Washington, left, places a wreath at the Tomb of the Unknowns during a Veteran’s Day ceremony at Arlington National Cemetery on Friday.(Pablo Martinez Monsivais/AP)

Nov. 10: Rowers on the foggy Potomac River approach the Memorial Bridge in Washington on Thursday.(J. Scott Applewhite/AP)

Nov. 9: Trader Michael Zicchinolfi runs across the floor the New York Stock Exchange on Wednesday. The Dow Jones Industrial Average lost more than 240 points in early trading after Italy's borrowing costs soared.(Richard Drew/AP)

Nov. 8: President Obama visits a classroom at Yeadon Regional Head Start Center in Yeadon, Pa., on Tuesday.(Charles Dharapak/AP)

Nov. 4: President Obama smiles in the rain as he and French President Nicolas Sarkozy attend an event on Friday honoring the alliance between the United States and France and their efforts in Libya at Cannes City Hall, after the G20 Summit in Cannes, France.(Charles Dharapak/AP)

Nov. 3: World leaders pose for the group photo for the G20 summit in Cannes, France, on Thursday.(Markus Schreiber/AP)

Nov. 2: President Obama speaks in front of the Key Bridge on Wednesday, which spans the Potomac River between Arlington, Va., and Washington.(Pablo Martinez Monsivais/AP)

Nov. 1: Defense Secretary Leon Panetta, left, greets Turkey's Defense Minister Ismet Yilmaz, between members of the military on Tuesday at the Pentagon.(JACQUELYN MARTIN/AP)

Oct. 28: Members of the Veteran Corps of Artillery of New York remove their cannons following a ceremony at the Statue of Liberty to mark her 125th anniversary on Friday.(MARK LENNIHAN/AP)

Oct. 21: President Obama speaks in the briefing room of the White House on Friday where he announced that all U.S. troops would be withdrawn from Iraq by year's end.(EVAN VUCCI/AP)

Oct. 20: Libyans celebrate Muammar el-Qaddafi death in Tripoli, Libya, on Thursday. Libya's information minister said Qaddafi was killed on Thursday when revolutionary forces overwhelmed his hometown, Surt, the last major bastion of resistance two months after the regime fell.(ABDEL MAGID al-FERGANY/AP)

Oct. 19: A protester throws a stone at Greek police officers during clashes in central Athens on Wednesday. Greek anger over new austerity measures and layoffs erupted into violence Wednesday, as demonstrators hurled chunks of marble and gasoline bombs, and riot police responded with tear gas and stun grenades that echoed across Athens' main square.(LEFTERIS PITARAKIS/AP)

Oct. 18: President Obama delivers remarks at the YMCA at Guilford Technical Community College in Jamestown, N.C., on Tuesday.(GERRY BROOME/AP)

Oct. 14: Clouds are seen over Air Force One at Joint Base Andrews, Md., on Friday before President Obama's arrival, prior to the president traveling to Detroit.(ANN HEISENFELT/AP)

Oct. 13: President Obama welcomes South Korean President Lee Myung-bak during a state arrival ceremony on the South Lawn of the White House on Thursday.(EVAN VUCCI/AP)

Oct. 12: President Obama speaks at the White House Forum on American Latino Heritage on Wednesday at the Interior Department in Washington.(Carolyn Kaster/AP)

Oct. 7: President Obama stands with the 1985 Super Bowl XX Champions Chicago Bears football team during a ceremony on the South Lawn of the White House on Friday.(PABLO MARTINEZ MONSIVAIS/AP)

Oct. 6: President Obama gestures during a news conference in the East Room of the White House on Thursday.(SUSAN WALSH/AP)

Oct. 5: Homeland Security Secretary Janet Napolitano gestures while discussing the department's enforcement of immigration laws on Wednesday at American University in Washington.(JACQUELYN MARTIN/AP)

Oct. 4: New Jersey Gov. Chris Christie listens to a question in the Statehouse in Trenton, N.J., on Tuesday after he announced that he will not run for president in 2012.(MEL EVANS/AP)

Sept. 30: President Obama pauses as he speaks on the killing of Anwar al-Awlaki on Friday during a 'Change of Office' ceremony at Ft. Myer in Arlington, Va.— PHOTO: PABLO MARTINEZ MONSIVAIS/AP PHOTO(PABLO MARTINEZ MONSIVAIS/AP PHOTO)

Sept. 28: Rev. Al Sharpton on Wednesday announces details of a march for "Jobs Justice" to be held on Oct. 15, during a news conference at the National Press Club in Washington.— PHOTO: EVAN VUCCI/AP PHOTO(EVAN VUCCI/AP PHOTO)

Sept. 22: Rep. Charlie Rangel on Thursday speaks at the unveiling of his portrait, which will be hung in the House Ways and Means Committee hearing room— PHOTO: CHET SUSSLIN(Chet Susslin)

Sept. 27: A man attaches rigging to the top of the Washington Monument on the National Mall, in Washington, on Tuesday before engineers rappelled down the sides of the monument to survey the extent of damage sustained to the monument from the Aug. 23 earthquake.— PHOTO: JACQUELYN MARTIN/AP PHOTO(Jacquelyn Martin/AP)

Sept. 21: President Obama addresses the 66th session of the United Nations General Assembly at U.N. headquarters on Wednesday.— PHOTO: JASON DECROW/AP PHOTO(JASON DECROW/AP PHOTO)

Sept. 20: Republican presidential hopeful Rick Perry speaks at a press conference with American and Israeli Jewish leaders and supporters of Israel, in New York on Tuesday, where he attacked President Obama's foreign policy.— PHOTO: MARY ALTAFFER/AP PHOTO(MARY ALTAFFER/AP PHOTO)